Rosco Manufacturing Husky 5.56 Nato Threaded Barrel. SOCOM profile barrel with a chrome-lined chamber and bore, finished in Chrome Lined Phosphate. Button rifled for Rosco accuracy. Barrel lengths available in 10.3, 11.5, 12.5, and 14.5 inches. Threaded for AR-15/M16 with 1/2x28 threads. Gas system length: Patrol. Weight: approximately 2.6 lb. Color: Black. Material: 4150 CMV. Finish: Chrome Lined Phosphate. Compatibility: AR-15 platform. Package Contents: Rosco Manufacturing Husky 5.56 Nato Threaded Barrel.